What is the acceptable recovery method for refrigerant less than 200 lbs.?

The acceptable recovery method for refrigerants less than 200 lbs. requires achieving a vacuum level of 10 inches of mercury (Hg). This method is crucial to ensure that all refrigerant is safely and effectively recovered from the system, minimizing the release of refrigerants into the atmosphere, which can be harmful to the environment and is regulated by various laws.

Achieving a vacuum of 10 inches of mercury indicates that most of the refrigerant has been removed from the system. This level is sufficient for systems with less than 200 lbs. of refrigerant, ensuring compliance with recovery guidelines and standards. It also helps in preventing any potential harm or inefficiency that might arise from lingering refrigerants in the system.

The other choices involving different vacuum levels or refrigerant amounts do not comply with the recommended practices for recovery of refrigerants less than 200 lbs. Hence, obtaining a 10” Hg vacuum for systems in this category is the best approach to ensure proper refrigerant recovery.